Concurrent Haskell Debugger (CHD)

Concurrent
Haskell is a concurrent extesion of the lazy, purely functional
programming language Haskell
98. It extends Haskell by IO actions for creating concurrent
threads and communication primitives like mutable variables, channels
and two kinds of semaphors.

For debugging Concurrent Haskell application we provide the debugger
library ConcurrentDebug. It can be used by replacing "import
Concurrent" by "import ConcurrentDebug" in each module of the
application. It works with ghc
version 5 and the TclHaskell
library (with a slight correction in the export list of the module
Tcl.hs: add ScrollUnit(..),).